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Academic literature on the topic 'Sucking Tea pest'

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Published: 18 May 2024

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Journal articles on the topic "Sucking Tea pest"

1

Ekka, Preety, Azariah Babu, and Lakhi Ram Saikia. "POTENTIAL OF NEW STRAIN OF BEAUVERIA BASSIANA ISOLATED FROM TINSUKIA (ASSAM) AGAINST TEA MOSQUITO BUG HELOPELTIS THEIVORA WATERHOUSE (HETEROPTERA: MIRIDAE)." Journal of Biopesticides 12, no. 01 (June 1, 2019): 104–8. http://dx.doi.org/10.57182/jbiopestic.12.1.104-108.

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ABSTRACT Tea mosquito bug, Helopeltis theivora Waterhouse, is the major sucking pest of tea plant. It mainly attacks the young shoots essential for tea production. In lacunae of proper management, the pest remains active throughout the year resulting in almost 100% crop loss. To manage the population of this pest below Economic Threshold Level (ETL) of 5%, several rounds of chemical pesticides are applied during the season. Tea, being a consumable product; the unwanted pesticide residue cause a major concern for the tea industry. Thus, incorporation of alternate strategies like Biological Control Agents (BCA) in pest management programme is important to overcome the problems besides prevent the pest from developing resistance. The BCAs like entomopathogenic bacteria, fungi and virus are effective in an eco-friendly management of the pest population. The entomopathogenic fungi, Beauveria bassiana has been found to be effective pest control agent in several agro ecosystems including tea. Commercial B. bassiana formulations are available but the local strains are reported to be more efficient in managing the pest population. The present study was aimed to analyze the potential of a new strain of B. bassiana named as BPA/B7 (I.D. No. 10,928.8) isolated from tea soils of Tinsukia (Assam) against H. theivora. The efficacy of six concentrations (5 mlL-1, 10 mlL-1, 15 mlL-1, 20 mlL-1 and 25 mlL-1 ) of powder formulation of BPA/B7 was compared with a commercial formulation to estimate the LC50 of the same. The BPA/B7 (B. bassiana with a spore density of 1.68X106 spores/ml was found to kill 50% of H. theivora at a concentration of 21.87 mlL-1 within 96hrs. Further studies on the standardization of both liquid/powder formulations, shelf life studies, followed by their field evlauation, will ensure the possibility of utilizing this strain as a potential componemt of intergrated management of H. theivora.
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Chang, Yali, Yuxian Xing, Yanan Dong, Xiwang Li, Songbo Lin, Yi Chen, and Xiaoling Sun. "Biological evidences for successive oogenesis and egg-laying of Matsumurasca onukii." PLOS ONE 17, no. 2 (February 17, 2022): e0263933. http://dx.doi.org/10.1371/journal.pone.0263933.

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Tea plant (Camellia sinensis) is one of the most important horticultural cash crops, and tea green leafhopper (Matsumurasca onukii) is an extremely harmful sap-sucking pest of tea plant. Serious generation overlapping, which is mainly caused by the long oviposition period, leads to poor control effect of pesticides on this pest in the tea plantation. But the intuitive evidences of continuous oogenesis and egg-laying of this pest are still lacking, which seriously hindered the development of genetic control methods. Here, we clarified the main structures of the inner reproductive system of tea green leafhopper female adult. Oviposition behaviors were monitored as well, and six oviposition steps were recorded. According to the maturity of oocytes, the maturity stages of the reproductive system under different copulation periods were classified into 4 stages. For female adults at stage IV, mature and immature oocytes were presented simultaneously, and the developmental levels of oocytes were asynchronous among different ovarioles. The proportion of gravid females with mature oocytes significantly increased when the continuous copulation time was prolonged. In sync with the development of the ovary maturity, female adults started to slightly deposit eggs at the 5th day, and then increased dramatically. In addition, we found that, whether mature or immature, oocytes in the ovarioles always emitted green fluorescence under blue light excitation, which in turn provide solid proof for the new egg detection method from the insect physiology point of view.
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Pan, Cheng, Xueyi He, Luxia Xia, Kexin Wei, Yuqun Niu, and Baoyu Han. "Proteomic Analysis of Salivary Secretions from the Tea Green Leafhopper, Empoasca flavescens Fabrecius." Insects 15, no. 4 (April 22, 2024): 296. http://dx.doi.org/10.3390/insects15040296.

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Saliva plays a crucial role in shaping the compatibility of piercing–sucking insects with their host plants. Understanding the complex composition of leafhopper saliva is important for developing effective and eco-friendly control strategies for the tea green leafhopper, Empoasca flavescens Fabrecius, a major piercing–sucking pest in Chinese tea plantations. This study explored the saliva proteins of tea green leafhopper adults using a custom collection device, consisting of two layers of Parafilm stretched over a sucrose diet. A total of 152 proteins were identified using liquid chromatography–tandem mass spectrometry (LC-MS/MS) following the filter-aided sample preparation (FASP). These proteins were categorized into six groups based on their functions, including enzymes, transport proteins, regulatory proteins, cell structure proteins, other proteins, and unknown proteins. Bioinformatics analyses predicted 16 secreted proteins, which were successfully cloned and transcriptionally analyzed across various tissues and developmental stages. Genes encoding putative salivary secretory proteins, including Efmucin1, EfOBP1, EfOBP2, EfOBP3, Efmucin2, low-density lipoprotein receptor-related protein (EfLRP), EFVg1, and EFVg2, exhibited high expressions in salivary gland (SG) tissues and feeding-associated expressions at different developmental stages. These findings shed light on the potential elicitors or effectors mediating the leafhopper feeding and defense responses in tea plants, providing insights into the coevolution of tea plants and leafhoppers. The study’s conclusions open avenues for the development of innovative leafhopper control technologies that reduce the reliance on pesticides in the tea industry.
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Das, Kishore Kumar, GSK Swamy, and Sheetal Rawat. "Effects of Datomaceous Earth on the Incidence Of Sucking Pest of Guava." Bangladesh Journal of Botany 51, no. 4 (December 29, 2022): 813–16. http://dx.doi.org/10.3329/bjb.v51i4.63501.

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Effects of diatomaceous earth (DE) as a source of silicon on incidence of Helopeltis antonii Signoret and Aleurodicus dispersus Russell in Guava var. Sardar were investigated. In the month of September and October maximum infestation (2.79) was observed in control plots and the least infestation (1.93) was observed in treatment with RDF + 3kg/plant of DE. In the month of November, the maximum infestation (3.62) was found in control, while the least infestation (1.89) was noticed in RDF + 3 kg/plant of DE. Again, in the month of December the maximum infestation (3.60) of tea mosquito bug was observed in the Half of RDF + 3 kg/plant of DE, followed by control (3.48) and the least infestation (2.83) was noticed in RDF + 3 kg/plant of DE. Bangladesh J. Bot. 51(4): 813-816, 2022 (December)
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Zhou, Ying, Xiaoyu Liu, and Ziyin Yang. "Characterization of Terpene Synthase from Tea Green Leafhopper Being Involved in Formation of Geraniol in Tea (Camellia sinensis) Leaves and Potential Effect of Geraniol on Insect-Derived Endobacteria." Biomolecules 9, no. 12 (November 30, 2019): 808. http://dx.doi.org/10.3390/biom9120808.

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When insects attack plants, insect-derived elicitors and mechanical damage induce the formation and emission of plant volatiles that have important ecological functions and flavor properties. These events have mainly been studied in model plants, rather than crop plants. Our study showed that tea green leafhopper (Empoasca (Matsumurasca) onukii Matsuda), a major pest infesting tea attack significantly induced the emission of geraniol from tea leaves, but did not affect the crude enzyme activity of geraniol synthase in tea leaves. An enzyme extract of E. (M.) onukii specifically produced geraniol from geraniol diphosphate. Furthermore, a terpene synthase (EoTPS) was isolated from E. (M.) onukii. This terpene synthase was able to convert geraniol diphosphate to geraniol in vitro. In addition, geraniol had in vitro ability to inhibit the growth of Acinetobacter johnsonii that is endobacterial isolated from E. (M.) onukii. This information illustrates that elicitors from piercing-sucking insects can induce the formation of volatiles from crop plants and advances our understanding of the roles of plant volatiles in the interaction among crops-insects-microorganisms.
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Saha, Dhiraj. "Host plant-based variation in fitness traits and major detoxifying enzymes activity in Scirtothrips dorsalis (Thysanoptera: Thripidae), an emerging sucking pest of tea." International Journal of Tropical Insect Science 36, no. 03 (June 6, 2016): 106–18. http://dx.doi.org/10.1017/s1742758416000102.

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AbstractScirtothrips dorsalisHood is a polyphagous species and an important sucking pest of tea (Camellia sinensis) (Theaceae). The fitness traits ofS. dorsalison two alternative host plants:Capsicum annuumL. (chilli) (Solanaceae) andRicinus communis(castor oil plant) (Euphorbiaceae) and onC. sinensisand corresponding levels of defence enzymes was studied. The study revealed thatC. sinensisis the more suitable host ofS. dorsalisbased on faster development (13.6 days) compared to the alternative hosts,C. annuum(15.5 days) andR. communis(16.7 days), a higher fecundity (C. sinensis: 11.4 eggs;C. annuum: 9.7 eggs;R. communis: 8.6 eggs), and superior egg hatchability (C. sinensis, 92.6%;C. annuum: 82.5%; andR. communis: 74.6%). The host-based variation in the fitness traits ofS. dorsaliscorroborated in light of differential activity of three major detoxifying enzymes, such as the general esterases (GEs), glutathioneS-transferases (GSTs), and cytochrome P450 mediated monooxygenases (CYPs). Densitometric analysis of GEs showed five esterase isozymes (EST I–V) with retardation factor (Rf) values of 0.17, 0.22, 0.27, 0.35 and 0.52, respectively. The pixel density, and accordingly the profile height, varied in different host-specificS. dorsalis. A significant variation of the quantity of these enzymes was also apparent in the insect when reared on the three hosts. A 2.4 and 2.7, 1.6 and 2.0, and 2.0 and 2.3-fold higher GEs, GSTs and CYPs activity on the two non-tea hosts possibly signify a predisposition of the species for higher tolerance to insecticides, enabling the pest to switch to tea where synthetic insecticides are routinely used.
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Lu, Changhao, Ni Shen, Wenbin Jiang, Bi Xie, Runa Zhao, Guolan Zhou, Degang Zhao, Yingqin He, and Wenlong Chen. "Different Tea Germplasms Distinctly Influence the Adaptability of Toxoptera aurantii (Hemiptera: Aphididae)." Insects 14, no. 8 (August 7, 2023): 695. http://dx.doi.org/10.3390/insects14080695.

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Aphids are typical phloem-sucking insect pests. A good understanding regarding their feeding behavior and population dynamics are critical for evaluating host adaptation and screening of aphid-resistant resources. Herein, the adaptability of Toxoptera aurantii (Boyer) (Hemiptera: Aphididae) to different hosts was evaluated via electropenetrography and an age-stage, two-sex life table on six tea germplasms: Zikui (ZK), Zhongcha108 (ZC108), Zhongcha111 (ZC111), Qianmei419 (QM419), Meitan5 (MT5), and Fudingdabaicha (FD). Our findings revealed that the feeding activities of T. aurantii differed considerably among the host plants. T. aurantii exhibited significantly more pathway activities on ZK and FD than on the other hosts. However, the duration of feeding of T. aurantii on ZK phloem considerably decreased compared with those of the other germplasms. Life parameters indicated that T. aurantii exhibited the highest intrinsic rate of increase (r), net reproductive rate (R0), and finite rate of increase (λ) on MT5, and the maximum values of total longevity and oviposition period were recorded on FD; these variables were reduced significantly on ZK. The results of our study demonstrate that T. aurantii can successfully survive on the six tea germplasms; however, ZK was less suitable for T. aurantii and should be considered as a potential source of resistance in breeding and Integrated Pest Management.
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Saha, Dhiraj, Ananda Mukhopadhyay, and Min Bahadur. "Effect of host plants on fitness traits and detoxifying enzymes activity of Helopeltis theivora, a major sucking insect pest of tea." Phytoparasitica 40, no. 5 (July 19, 2012): 433–44. http://dx.doi.org/10.1007/s12600-012-0244-2.

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9

Saha, Dhiraj, Ananda Mukhopadhyay, and Min Bahadur. "Variation in the Activity of Three Principal Detoxifying Enzymes in Major Sucking Pest of Tea, Helopeltis theivora Waterhouse (Heteroptera: Miridae) from Sub-Himalayan Tea Plantations of West Bengal, India." Proceedings of the Zoological Society 66, no. 2 (August 2, 2012): 92–99. http://dx.doi.org/10.1007/s12595-012-0039-y.

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10

Tengfei, Liu, Wang Yao, Zhang Lixia, Xu Yongyu, Zhang Zhengqun, and Mu Wei. "Sublethal Effects of Four Insecticides on the Seven-Spotted Lady Beetle (Coleoptera: Coccinellidae)." Journal of Economic Entomology 112, no. 5 (May 29, 2019): 2177–85. http://dx.doi.org/10.1093/jee/toz146.

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Abstract To further develop integrated pest management (IPM) strategies against two sucking insect pests, Aleurocanthus spiniferus (Quaintanca) (Hemiptera: Aleyrodidae) and Toxoptera aurantii Boyer (Hemiptera: Aphididae), in Chinese tea plantations, it is important to evaluate the effects of insecticides on biological control agents, such as the seven-spot lady beetle, Coccinella septempunctata L. (Coleoptera: Coccinellidae). Therefore, we tested the toxicity and sublethal effects of spirotetramat, clothianidin, lambda-cyhalothrin, and bifenthrin on C. septempunctata. The side effects of the active ingredients of the insecticides were evaluated with residual contact tests on the larvae of C. septempunctata in the laboratory. Spirotetramat and clothianidin exhibited lower lethality to C. septempunctata as shown by the higher LC50 values and had higher selectivity for A. spiniferus and T. aurantii based on the selective toxicity ratios being superior to other tested insecticides. Spirotetramat also did not affect survival, longevity, fecundity, and egg hatching of C. septempunctata. Clothianidin and bifenthrin prolonged the duration of larval development stages of C. septempunctata obviously. Clothianidin at >2.5 mg/liter, lambda-cyhalothrin at >0.03 mg/liter, and bifenthrin at >0.125 mg/liter significantly reduced the survival and pupation rates of C. septempunctata larvae. Furthermore, spirotetramat at 3.125 mg/liter was harmless (IOBC class 1) to larvae of this coccinellid species. Based on the results, spirotetramat was innocuous to C. septempunctata larvae compared with clothianidin, lambda-cyhalothrin, and bifenthrin. Therefore, spirotetramat might be incorporated into IPM programs in combination with C. septempunctata for control of A. spiniferus and T. aurantii in the tea plantations.
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Dissertations / Theses on the topic "Sucking Tea pest"

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Basnet, Kumar. "Enzyme-based detection of pesticide tolerance in the sucking tea pest, helopeltis theivora waterhouse (insecta: heteroptera: miridae) with a study on bio-ecological aspects of its common spider predator from the terai tea plantations of Darjeeling foothills and plains." Thesis, University of North Bengal, 2017. http://hdl.handle.net/123456789/2626.

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Pathak, Sunil Kumar. "Population dynamics and feeding impact of some sucking pests on Darjeeling Tea." Thesis, University of North Bengal, 2004. http://hdl.handle.net/123456789/1046.

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Saha, Dhiraj. "Assessment of Population Variability at Subcellular Level of Some Common Sucking Tea Pests from Darjeeling Hill and its Adjoining Plain." Thesis, University of North Bengal, 2013. http://hdl.handle.net/123456789/951.

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